Spirocercosis in stray dogs of Chittagong metropolitan area of Bangladesh: an epidemiological and pathological investigation

Abstract

A total of sixty adult stray dogs (32 male and 28 female) randomly captured from different locality of Chittagong metropolitan area were euthanized during the period of May 2010 to January 2011. The dogs were necropsized to observe the presence of Spirocerca lupi in their oesophagus producing characteristic nodular lesions. The associated haematological changes were also determined. Twenty four (40%) of the captured dogs were positive (40.62 % male and 39.28 % female) for spirocercosis having oesophageal nodular lesions. One to three broad based nodular lesions with an average diameter of 2.104±0.139 cm were observed in the caudal oesophagus of spirocerca positive dogs. Minimum 1 and maximum 12 worms found harboring in each nodule with an average number of 3.75± 0.686. The association between the oesophageal nodular lesions and body condition of the dogs was inconclusive and locationwise prevalence was also not clear. Anaemia was observed in infected dogs with significant reduction in ESR values and MCHC%. Leukocytosis, particularly neutrophilia was common in infected dogs in comparison to the noninfected. Histopathology revealed extensive fibrous tissue proliferation around the adult worms in most of the nodular lesions with large numbers of newly formed blood vessels resembling granulation tissues. A considerable degree of fibroplasia was evident with predominant accumulation of fibroblasts and irregular layers collagen fibers in mature nodules. Accumulation of large numbers of neutrophil was common in nodular lesions, whereas, infiltration of lymphoplasmacytic cells also found in some cases. One lesion showed evidence of fibrosarcoma characterized by proliferation of undifferentiated atypical fibroblasts having abnormal mitotic figures.

Prevalence of intestinal parasites in street dogs (Canis lupus familiaris) with highlights on zoonosis in Lalitpur, Nepal

“…The current study first identified a considerable diversity of intestinal parasites from free‐ranging canids in the study area and Nepal. The current prevalence rate of intestinal parasites (95.7%; n = 332) was on par with the report of stray canids from Bangladesh (95%; n = 60) (Das et al., 2012), lower than from Ethiopia (100%; n = 13) (Jones et al., 2011) and India (99%; n = 101) (Traub et al., 2014) but was higher than from Nepal (56.2%–78.5%; n = 105–157) (Satyal et al., 2013; Yadav & Shrestha, 2017), India (90.7%; n = 108) (Sudan et al., 2015), South Africa (82.5%; n = 240) (Mukaratirwa & Singh, 2010), Malaysia (87.7%, n = 77 to 88.3%, n = 227) (Ngui et al., 2014; Tun et al., 2015) and Vietnam (55.5%, n = 200) (Ng‐Nguyen et al., 2015). It indicates that the prevalence rate of intestinal parasites is different in different countries; these variations might be due to the difference in geo‐climatic factors, sample size, sampling breed, sampling season, treatment strategy and methodological contrasts.…”

“…The current prevalence rate of intestinal parasites (95.7%; n = 332) was on par with the report of stray canids from Bangladesh (95%; n = 60) (Das et al, 2012), lower than from Ethiopia (100%; n = 13) (Jones et al, 2011) and India (99%; n = 101) (Traub et al, 2014) animal carcasses, leftover foods, garbage, animal dung and human faeces. Furthermore, they also lick water from contaminated sources that contribute to parasitosis.…”

Cancerogenic parasites in veterinary medicine: a narrative literature review

“…Examples come from Israel [94], Jamaica [94], Egypt [97], Brazil [98,99], Lousiana [100], Central America [23,78], Kenya [72,[101][102][103], India [104][105][106]. Some of the more recent investigations were carried out in South Africa [92,[107][108][109], Iran [110], Bangladesh [111], Israel [95,112,113], and America [114][115][116]. Since malignant esophageal neoplasms are extremely uncommon in locations without spirocercosis [115], it was easier to prove a causal relationship [68].…”

Espirocercose Em Cão Errante Na Cidade Da Matola, Sul De Moçambique

“…Em Granada, na Espanha, a prevalência da espirocercose em cães com donos e errantes foi, respectivamente, de 8,8% e 14,2% (3). Caninos errantes geralmente não são submetidos a tratamento profilático com vermífugos e estão mais susceptíveis à infecção quando ingerem larvas infectantes L3 de Spirocerca lupi, contidas em besouros coprófagos, aves, répteis ou roedores (6). As condições climáticas, caracterizadas por altas temperaturas e alta queda pluviométrica durante o verão, e a deficiente infraestrutura de recolha e gestão de resíduos sólidos podem contribuir para a ocorrência da parasitose em cães errantes na cidade da Matola.…”

“…O tamanho dos nódulos e a localização dos nódulos parasitários no terço posterior da porção torácica do esôfago corroboram os achados descritos por outros autores (4,6,21). Em casos de migração errática, larvas do parasito podem enquistar no estômago, vértebras, pleura, artéria aorta, rins, mediastino, tecido nervoso central e pele, resultando em sinais clínicos atípicos da parasitose (3,10,12,13,24,25,28).…”